Paying Cash for Transport
For buses, it is advised that the EXACT change is on hand. As the bus driver will not give you change, you will have to wait at the door for a friendly commuter to combine their fare with yours. However on some express buses where an attendant is on hand, you can get limited change.
For taxis and cash payment, expect the driver to always round up to the nearst RMB.
Long distant trains, ferries and buses are not a problem since you buy your ticket from a ticket office.
For the metro, limited change is available from ticket machines. If you have bills greater than 10RMB, go to the info desk and get change first.